Commit d5750cd3 authored by Nathan Chancellor's avatar Nathan Chancellor Committed by Masahiro Yamada
Browse files

kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1 

ld.lld 10.0.1 spews a bunch of various warnings about .rela sections,
along with a few others. Newer versions of ld.lld do not have these
warnings. As a result, do not add '--orphan-handling=warn' to
LDFLAGS_vmlinux if ld.lld's version is not new enough.

Link: https://github.com/ClangBuiltLinux/linux/issues/1187
Link: https://github.com/ClangBuiltLinux/linux/issues/1193


Reported-by: default avatarArvind Sankar <nivedita@alum.mit.edu>
Reported-by: default avatarkernelci.org bot <bot@kernelci.org>
Reported-by: default avatarMark Brown <broonie@kernel.org>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent 59612b24

MAINTAINERS

+1 −0
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@@ -4274,6 +4274,7 @@ B: https://github.com/ClangBuiltLinux/linux/issues 
C:	irc://chat.freenode.net/clangbuiltlinux

F:	Documentation/kbuild/llvm.rst

F:	scripts/clang-tools/

F:	scripts/lld-version.sh

K:	\b(?i:clang|llvm)\b















CLEANCACHE API

































init/Kconfig



+5
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@@ -47,6 +47,10 @@ config CLANG_VERSION













	int















	default $(shell,$(srctree)/scripts/clang-version.sh $(CC))





























config LLD_VERSION













	int













	default $(shell,$(srctree)/scripts/lld-version.sh $(LD))





























config CC_CAN_LINK















	bool















	default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(m64-flag)) if 64BIT










@@ -1351,6 +1355,7 @@ config LD_DEAD_CODE_DATA_ELIMINATION













config LD_ORPHAN_WARN















	def_bool y















	depends on ARCH_WANT_LD_ORPHAN_WARN













	depends on !LD_IS_LLD || LLD_VERSION >= 110000















	depends on $(ld-option,--orphan-handling=warn)































config SYSCTL

































scripts/lld-version.sh
0 → 100755



+20
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#!/bin/sh













# SPDX-License-Identifier: GPL-2.0













#













# Usage: $ ./scripts/lld-version.sh ld.lld













#













# Print the linker version of `ld.lld' in a 5 or 6-digit form













# such as `100001' for ld.lld 10.0.1 etc.



























linker_string="$($* --version)"



























if ! ( echo $linker_string | grep -q LLD ); then













	echo 0













	exit 1













fi



























VERSION=$(echo $linker_string | cut -d ' ' -f 2)













MAJOR=$(echo $VERSION | cut -d . -f 1)













MINOR=$(echo $VERSION | cut -d . -f 2)













PATCHLEVEL=$(echo $VERSION | cut -d . -f 3)













printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL


























































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